Thermostat



July 1l', 1950 E. H. scHuLTz 2,514,803

THERMOSTAT Filed Nov. 1'6, 1948 INVENTOR.

#fiar/Zay Patented July 11, 1,950

UNITEDv STATES PATENT vOFFICE THERMOSTAT `Edward H. Schultz, Buffalo, Minn. l f Application November 16, 1948,',S'erial No. 60,2411

' bustion engines and the primary object of the invention is to prevent the cooling liquid in a radiator from freezing in cold weather under the i influence of the fan draft by permitting the liquid to circulate freely, when the motor is started,

y until the radiator is warmed up.

Another object of the invention is to interrupt the free flow of the cooling fluid through the cooling system when the radiator and the cooling 1 Claim. A( Cl. 2365-34) at I9 and on the inneredge of'said flange a shalfluid are heated by the running motor to a desired degree.

A further object of the invention is to permit the cooling liquid to flow freely through the cooling system when the motor and the cooling fluid are heated beyond a predetermined degree.

Theinvention consists in the details of construction and in the combination and arrangement of the several parts of my improved thermostat, whereby certain advantages are attained, as will be hereinafter more fully set forth. I

In order that my invention may be better understood, I will now proceed to describe the same` with reference to the accompanying drawings, wherein:

Figure 1 is a View partly in section and partly l in elevation illustrating an embodiment of the invention for heating liquid within a radiator, the valve being shown in initial open position;

Figure 2 is a view similar to Figure 1 with the valve closed;

Figure 3 is also a view similar to Figure 1 but shows the valve in its outer open position; and

Figure 4 is a sectional view taken substantially y on the line 4-4 of Figure 2.

The thermostat in accordance with the inveny tion as herein embodied comprises a standard round thermostat body I0 shaped like a bellows.

' 1 One end of said body is secured by soldering or the like to a circular end plate II. At diametrically opposite places two arms I2 are formed on said end plate and extend at right angles thereto longside of the body I0. On the other end of body I0 a second circular end plate I3 is mounted in anyV preferred suitable manner and a valve rody I4 is arranged coaxially on the end plate I3 and extends at right angles therefrom between the arms I2. A cross arm l5 extends between the arms I2 and is secured on them adjacent to the free ends thereofas indicated at I6. In the middle portion of the cross arm I5 a. guide rod I4 extends through said guide ring I1.

An annular flange I8 is firmly mounted on the free end portions of the arms I2 as indicated low ring flange 20 is formed and extends outwardly at a right angle thereto. On the free en'd portion of the valve rod I4 a circular damper 2| is firmly mounted so that the valve rod and the damper are located coaxially with each other. On the circumferential edge of the damper 2| a shallow outwardly extending flange 22 is formed and the outside diameter of this flange is such that it fits slidably in the annular flange 20. The relative length of the thermostat body I0 andthe Valve rod I4 with respect to the length of the arms I2 is such, that the damper flange 22 will be located below the annular flange I8, when the bellows-like thermostat body I0 is entirely collapsed as shown in Figure l, and that the damper 2| will be arranged above the shallow inner flange 2d of the annular flange I8, when the body I0 is entirely expanded. The above described thermostat is mounted on a cylinder block in any desired conventional manner, for instance, as shown in the accompanying drawings. In this embodiment an angular pipe fitting 23 is provided on one of its end portions with an outwardly extending flange 24, which is adapted to be secured by means of bolts 25 to a cylinder block 26 so that the bore of the tting 23 communicates with the outlet opening 2l of the cooling chamber 28 in the cylinder block 26. The assembled thermostat is inserted into the pipe fitting 23 so that the body I0 is located inside of the fitting and the annular flange I8 rests against the free end of the pipe fitting and is secured to the fitting in any conventional manner, for instance by means of screws 29, so that the thermostat is arranged approximately coaxially in the fitting.

A flexible hose 30, preferably made from rubber, is forced onto the free end of the pipe tting 23 and leads to the inlet of the radiator (not shown) and is secured in position in any conventional 4manner for instance by means of wire rings 3| held together by a bolt 32 extending through eyes 33 formed on the end portions of each ring 3|.

When the motor is started on a cold day, the thermostat body vI0 is entirely contracted and the opening in the shallow inner flange 20 is open, as shown in Figure 1, so that the cooling fluid will flow through the pipe fitting 23, through the thermostat vand the hose 30 into the radiator until the liquid is heated to a degree sufcient to expand the thermostat body I0 enough to push the damper 2| into the inner flange 20 `preventing heated toa degree sufficient to expand the thermostat body I 0 until the damper 2l is located above the annular flange I8 as shown in Figure 3 so that the cooling liquid can circulate freely.

When the damper 2| is in channel closing position and uid should collect in the hose 33, it is drained oli through a. small drain hole 34 provided in the damper 2|.

In this manner the radiator pipes (not shown) are warmed enough before the 110W of the cooling liquid is interrupted, to prevent freezing of the liquid under the influence of the fan draft.

I claim:

In a temperature control for the liquid cooling systems of motor vehicles and the like, the com.. bination of a pipe fitting of the system and a thermostatic control valve, said control valve be-` ing comprised in an annular seat secured on an end of said fitting, an open frame supported by said seat within and centrally of the said end of.' C

ANumber 'V seated with respect to the near side of said seat when the liquid of said system is cold and adapted to be moved by said expansible element relatively to said seat to cut off the flow of the liquid therethrough when the liquid is heated to a predetermined temperature and to be moved by said eX- pansible element relatively to the opposite side of said seat to restore the Iiow of the liquid when the predetermined temperature thereof is exceeded. y 'f y EDWARD H. SCHULTZ.

REFERENCES CITED The following references are of record in the lile ofA this patent:

UNITED STATES PATENTS Name Date j Re.17,696= Giesler June 10, 1930 2,242,039 Mulcey et al May 13, 1941 2,428,867 DeLancey Oct. 14, 1947 2,461,136 `Bornquist Feb. 8, 1949 2,463,598 Carson Mar. 8, 1949 2,470,503

Levine May 17, 1949 

